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Financial Statement Schedule I - Condensed Financial Information of Parent Company Balance Sheets (Details) ¥ in Thousands, $ in Thousands | Dec. 31, 2019 CNY (¥) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 CNY (¥) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 CNY (¥)
--- | --- | --- | --- | --- | ---
ASSETS |  |  |  |  |
Cash and cash equivalents | ¥ 1,402,226 | $ 201,417 | ¥ 1,248,810 |  |
Short-term investments | 217,640 | 31,262 | 1,028,564 |  |
Prepaid expenses and other current assets | 180,881 | 25,982 | 124,908 |  |
Total current assets | 2,044,194 | 293,630 | 2,582,939 |  |
Non-current assets |  |  |  |  |
Other non-current assets | 447,639 | 64,299 | 418,700 |  |
Total non-current assets | 1,924,508 | 276,438 | 1,156,199 |  |
TOTAL ASSETS | 3,968,702 | 570,068 | 3,739,138 |  |
Current liabilities |  |  |  |  |
Accrued expenses and other current liabilities | 435,225 | 62,516 | 455,284 |  |
Total current liabilities | 2,239,577 | 321,695 | 2,314,409 |  |
Non-current liabilities |  |  |  |  |
Other non-current liabilities | 11,469 | 1,647 | 17,147 |  |
Total non-current liabilities | 2,467,488 | 354,432 | 1,763,712 |  |
TOTAL LIABILITIES | 4,707,065 | 676,127 | 4,078,121 |  |
SHAREHOLDERS’ DEFICIT |  |  |  |  |
Additional paid-in capital | 2,363,999 | 339,567 | 2,391,822 |  |
Accumulated other comprehensive income | 142,435 | 20,460 | 118,827 |  |
Accumulated deficit | (3,244,587) | (466,056) | (2,849,770) |  |
TOTAL SHAREHOLDERS’ DEFICIT | (738,363) | (106,059) | (338,983) | ¥ (1,641,768) | ¥ (888,955)
TOTAL LIABILITIES AND SHAREHOLDERS’ DEFICIT | 3,968,702 | 570,068 | 3,739,138 |  |
Class B Ordinary Shares |  |  |  |  |
SHAREHOLDERS’ DEFICIT |  |  |  |  |
Ordinary shares | 0 | 0 | 0 |  |
Class A Ordinary Shares |  |  |  |  |
SHAREHOLDERS’ DEFICIT |  |  |  |  |
Ordinary shares | 1 |  | 1 |  |
Treasury stock | (30,793) |  | (34,828) |  |
TOTAL SHAREHOLDERS’ DEFICIT | 1 |  | 1 |  |
Class C Ordinary Shares |  |  |  |  |
SHAREHOLDERS’ DEFICIT |  |  |  |  |
Ordinary shares | 1 |  | 1 |  |
TOTAL SHAREHOLDERS’ DEFICIT | 1 |  | 1 |  |
Parent Company |  |  |  |  |
ASSETS |  |  |  |  |
Cash and cash equivalents | 1,125,048 | 161,603 | 1,086,521 |  |
Short-term investments | 0 | 0 | 441,513 |  |
Prepaid expenses and other current assets | 1,244 | 177 | 11,950 |  |
Amounts due from subsidiaries | 1,093,781 | 157,112 | 695,194 |  |
Total current assets | 2,220,073 | 318,892 | 2,235,178 |  |
Non-current assets |  |  |  |  |
Other non-current assets | 26,849 | 3,857 | 0 |  |
Total non-current assets | 26,849 | 3,857 | 0 |  |
TOTAL ASSETS | 2,246,922 | 322,749 | 2,235,178 |  |
Current liabilities |  |  |  |  |
Accrued expenses and other current liabilities | 6,942 | 997 | 6,268 |  |
Total current liabilities | 6,942 | 997 | 6,268 |  |
Non-current liabilities |  |  |  |  |
Investment in subsidiaries | 2,970,297 | 426,656 | 2,556,801 |  |
Other non-current liabilities | 7,834 | 1,125 | 11,228 |  |
Total non-current liabilities | 2,978,131 | 427,781 | 2,568,029 |  |
TOTAL LIABILITIES | 2,985,073 | 428,778 | 2,574,297 |  |
SHAREHOLDERS’ DEFICIT |  |  |  |  |
Treasury stock | 0 | 0 | 0 |  |
Additional paid-in capital | 2,363,999 | 339,567 | 2,391,822 |  |
Accumulated other comprehensive income | 142,435 | 20,460 | 118,827 |  |
Accumulated deficit | (3,244,587) | (466,056) | (2,849,770) |  |
TOTAL SHAREHOLDERS’ DEFICIT | (738,151) | (106,029) | (339,119) |  |
TOTAL LIABILITIES AND SHAREHOLDERS’ DEFICIT | 2,246,922 | 322,749 | 2,235,178 |  |
Parent Company | Class B Ordinary Shares |  |  |  |  |
SHAREHOLDERS’ DEFICIT |  |  |  |  |
Ordinary shares | 0 | 0 | 0 |  |
Parent Company | Class A Ordinary Shares |  |  |  |  |
SHAREHOLDERS’ DEFICIT |  |  |  |  |
Ordinary shares | 1 | 0 | 1 |  |
Parent Company | Class C Ordinary Shares |  |  |  |  |
SHAREHOLDERS’ DEFICIT |  |  |  |  |
Ordinary shares | ¥ 1 | $ 0 | ¥ 1 |  |

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